Attachment for lathes



(N0 M odel.)

B. A. BARNES. ATTACHMENT FOR LATHES. No. 307,901. Patented Nov. 11, 1884.

ATTORNEYS.

lr'l I j INVENTOR. 4% W195 ii-E V a A Saw T WITNESSES:

Marten warns Parent FFICE.

BENJAMIN ANDREW'S BARNES, .OF OELYVEIN, IOXVA.

ATTACH [VI ENT FOR LATH ES.

ESPECIPICATION forming part of Letters Patent No. 307,901, dated November 11, 1884.

Application filed March 20. 1884. (X0 model.)

T0 at whom it may concern.-

Be it known that I, BENJAMIN A. BARNES, of Oelwein, in the county of Fayette and State of Iowa, have invented certain new and useful Improvements in Attachment for Lathes; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to 'the accompanying drawings, which form a part of this specification, and in which Figure 1 is a perspective view of aportion of a watch-makers lathe provided with my i mproved clutcl1-arbors. Fig. 2 is a longitudinal vertical section through the same. Fig. 3 is a perspective view of the driving-disk, and Fig. at is a similar view of the driven disk.

Similar letters of reference indicate corre sponding parts in all the figures.

My invention has relation to attachments for watch-makers lathes or lathes for similar fine work; and it consists in the improved construction and combination of parts of so-called clutch-arbors, adapted to clamp the work between them in the lathe, as hereinafter more fully described and claimed.

111 the accompanying drawings, the letter A ndicates the head-stock of the lathe, and B ndicates the tail-stock, which has secured in it a socketed spindle, 0, having the socket D in its end concentric with said spindle, and in line with the axis of the livespindle.

E is a disk having a shank, F, projecting from the center of its back, which fits in the live-spindle or chuck, and the inner side or face of the disk has a central pointed pin, G, projecting through a facingblock, II, of cork, secured, by means of shellac or similar fastening means, to the face of the disk, and having its face I slightly concaved. A number of pointed screws, J, pass through the disk, turning in threaded perforations in the same, and through the cork arranged in a circle around the center of the disk, and may be brought to project with their points beyond the face of the cork. A disk, K, similar to the disk E,

has a shank or spindle, L, projecting from its back, the outer reduced end of which spindle fits and turns in the socket in the end of the spindle O, and is provided with a cork facing,

M, having its inner face concave, and with a circular set of screws, N, in the same manner as the disk upon the live-spindle. It will be seen that the work to be turned may be clamped 55. between the cork facings of the disks, which facings will hold it firmly, and at the same time, by their yielding properties, prevent any undue strain upon the work, and the pointed spindle or center upon the disk upon the livespindle will serve to center the work, while the pointed screws maybe brought forward to assist to hold the work, or to fit the work where there is no solid center for the pointed center of the disk upon the live-spindle. It will also be seen thatthe cork facings will support delicate work while being turned, and prevent it from being broken or scratched by metallic points. It follows that the clutches may be used for any kindof work, as for holding emery-wheels, oil-stone wheels, diamondwheels, or any polishing or grinding-wheels adapted to be used in a small lathe, the cork facings being sufficient to hold the wheels firmly clamped by friction.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In a lathe for fine work, two clutching-arbors secured to the spindles,and having facings of cork, as and for the purpose shown and set forth.

2. I11 a lathefor fine work, two clutching-arbors attached to the spindles, and provided with cork facings having their faces slightly concaved, as and for the purpose shown and set forth.

3. In a lathe for fine work, the combination of a disk having a shank adapted to be secured in the live-spindle or chuck, and provided 0 with a facing of cork having its face slightly concaved, and provided with acentral pointed spindle passing through the cork facing, with a disk provided with a shank, fitting with its reduced end in a socket in the dead-spindle, 5 and provided with'a facingof cork having its face slightly concaved, 'as and for the purpose shown and set forth.

4. In a lathe for fine work, the combination of a disk having a shank adaptedto be secured in the chuck or live-spindle, provided with a facing of cork having its face sl ightly concaved,

provided with a central pointed spindle passing through the cork facing, and having a number of pointedserews passing through the disk and through the cork, with adisk havin g a shank having its outer end reduced, provided with afacing of cork having its face eoneaved,

and having a number of pointed screws passing through the disk and through the cork, and a spindle having a socket at one end for 10 the reception of the reduced end of the spindleof the disk, and adapted to be secured in the tail-stock, as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature I 5 in presence of two witnesses.

BENJAMIN ANDREWS BARNES.

XVitnesses:

A. A. EDGERTON, PHIL KANE. 

